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Study of the ground-state energy of 40Ca with the CD-Bonn nucleon-nucleon potential

L. Coraggio·A. Covello·A. Gargano·N. Itaco·T. T. S. Kuo
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Abstract

We have calculated the ground-state energy of the doubly-magic nucleus 40Ca within the framework of the Goldstone expansion using the CD-Bonn nucleon-nucleon potential. The short-range repulsion of this potential has been renormalized by integrating out its high-momentum components so as to derive a low-momentum potential V-low-k defined up to a cutoff momentum Lambda. A simple criterion has been employed to establish a connection between this cutoff momentum and the size of the two-nucleon model space in the harmonic oscillator basis. This model-space truncation approach provides a reliable way to renormalize the free nucleon-nucleon potential preserving its many-body physics. The role of the 3p-3h and 4p-4h excitations in the description of the ground state of 40Ca is discussed.

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L. Coraggio, A. Covello, A. Gargano, N. Itaco, T. T. S. Kuo. 2007-04-23. Study of the ground-state energy of 40Ca with the CD-Bonn nucleon-nucleon potential. https://doi.org/10.1103/physrevc.75.057303

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